NDLI: Objectively Evaluating Environmental Comprehensive Quality by Improved AHP Method

Content Provider	IEEE Xplore Digital Library
Author	Yan Zhang Hong Zhang Zhenyu Zhong Xiang Gao Yinan Ni
Copyright Year	2008
Description	Author affiliation: Sch. of Geographic & Oceanogr. Sci., Nanjing Univ., Nanjing (Yan Zhang; Hong Zhang; Zhenyu Zhong; Xiang Gao)
Abstract	Calculating arithmetic weighted average value of environmental quality comprehensive index is a common method in environmental quality comprehensive evaluation. The relative importance of each pollution factor in the Analytical Hierarchy Process (AHP) method comes from pooling expert opinions in general. Because expert opinions are based on their information and judgment criterion, it may lead to the uncertainty of determining weight. In order to overcome this uncertainty, an improved AHP method is developed. The process of the improved AHP method involves the following key procedures. First based on the environmental monitoring data of pollution factors two parameters $y_{il}$ and $y_{i2}$ are calculated. Second the pollution factors are put in order according to the combinations of symbols and values of $y_{i2}$ and $y_{i2}.$ Third the odd integers are given to pollution factors in light of seating order of factors. And forth the factor weights are achieved by the judgment matrix formed on the pair- wise comparison of factors. This shows that weights of pollution factors are completely related to the objective monitoring data through a standardization of procedure by the improved AHP method. The environmental comprehensive quality of sediment in Qinhuai River, Nanjing, China is evaluated by the method. The environmental quality comprehensive indices (EQCI) of sediment in 1996-2000 and 2001-2005 are 4.52 and 3.32, indicating that sediment contaminations decrease in the decade. Such results in accord with the fact bring the Qinhuai River under comprehensive control. However by the classical AHP method the EQCI of sediment may indicate that sediment contamination increases from 1996 to 2005. The judgment difference by experts leads to the uncertainty of assessment result. Therefore, the improved AHP method can avoid arbitrariness of subjective judgment and reflect objectively the changes of factors contribution to environment pollution in different periods or regions.School of Geographic and Oceanographic Sciences
Starting Page	4645
Ending Page	4649
File Size	188248
Page Count	5
File Format	PDF
ISBN	9781424417476
DOI	10.1109/ICBBE.2008.320
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Condition monitoring Uncertainty Urban pollution Marine pollution Standardization Rivers Sediments Mathematical model Contamination Arithmetic
Content Type	Text
Resource Type	Article

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